console.log("here we go");
new Promise(resolve => {
    setTimeout(() =>{
        resolve("hello")
    },2000)
}).then(value =>{
    console.log(value);
    return new Promise(resolve =>{
        setTimeout(()=>{
            resolve("world");
        },2000)
    })
}).then(value => {
    console.log(value+"world");
})
